Champion 25 Spark Plug

Champion Copper Plus 25 Spark Plug Overview

Champion Copper Plus 25 is a replacement spark plug built for dependable ignition performance in a wide range of classic and light-duty vehicles. It uses a copper core electrode for improved conductivity and heat control, with nickel center and ground electrode materials for steady wear characteristics.

Compatible With applications such as Chevrolet Caprice, Pontiac Firebird, and Dodge B-series and D-series trucks, this Champion 25 spark plug is listed across many OE-style and normal-service fitments. The RV17YC plug type and tapered seat support direct replacement use where the original specification calls for this design.

Key Features

• Copper core electrode for conductivity and heat management
• Nickel center electrode tip and nickel ground electrode core material
• Pre-gapped at 0.035 in / 0.90 mm
• Resistor-type spark plug for ignition system noise control
• Tapered seat design with 14 mm thread diameter
• Champion Copper Plus classification for OE-style service applications
• Part number 25 for easy catalog matching

Product Details

The Champion Copper Plus line focuses on straightforward, dependable ignition service with a copper core electrode that helps maintain conductivity and heat control during everyday driving. This construction supports consistent spark delivery and controlled electrode wear, which is important in older carbureted and early fuel-injected engines that rely on stable ignition performance. The removable nut terminal adds flexibility for common ignition wire setups, while the 0.035 in pre-gap matches many listed OE-type applications.

Part number 25 is listed for a broad range of vehicles, including Chevrolet C10, Chevrolet Caprice, Pontiac Firebird, Ford Mustang, and Dodge B150 applications. It also cross-references Autolite 26 for the same application. If you are servicing a classic truck, full-size sedan, or older V8-powered car, this RV17YC spark plug provides a direct-match option for many factory-style ignition systems.

Common Problems This Part Addresses

• Hard starting caused by worn or inconsistent spark plugs
• Rough idle from degraded ignition performance
• Misfire concerns related to electrode wear
• Reduced throttle response from weak spark delivery
• Service replacement needs on OE-style ignition systems

Installation Notes and Tips

Verify the required plug type, seat style, thread diameter, and reach before installation. This plug is specified with a 0.035 in gap for many listed applications, but some vehicle fitments in the catalog call for different gap settings, so confirm the engine specification for your exact year and model. Use the removable nut terminal only if your ignition wire terminal requires it, and inspect the plug threads and sealing surface during service.

Fits 1983-1995 Chevrolet C35, 1988-1993 Chevrolet Caprice, 1987-1992 Pontiac Firebird, 1985-1987 Dodge B150, 1985-1987 Dodge D150, 1980-1984 Chevrolet Impala, and many other OE-type applications listed in the fitment data.

Quality Assurance

Champion Copper Plus spark plugs are built around a copper core design for dependable performance and controlled wear in service applications. Part number 25 is cataloged with OE-style fitment coverage across many Chevrolet, Pontiac, Ford, Dodge, Buick, Oldsmobile, GMC, Chrysler, Lincoln, and Mercury models.